1 2 3 4 5 6 7 8 9 10 | 1 1 1 30 30 30 30 | var makeString = require('./helper/makeString'); var toPositive = require('./helper/toPositive'); module.exports = function startsWith(str, starts, position) { str = makeString(str); starts = '' + starts; position = position == null ? 0 : Math.min(toPositive(position), str.length); return str.lastIndexOf(starts, position) === position; }; |